Method and system for classifying bacterial colonies

The invention provides a method and a system for classifying bacterial colonies. The method comprises the following steps: acquiring a grey-scale map of a to-be-classified bacterial colony; based on the grey-scale map of the to-be-classified bacterial colony, performing binarization processing on the grey-scale map of the to-be-classified bacterial colony by using an algorithm model, and obtaining a binary image in which the to-be-classified bacterial colony is white and other backgrounds are black; segmenting an overlapped bacterial colony region in the binary image by using a distance transformation-based watershed algorithm to obtain the number and contour of bacterial colonies; and classifying the bacterial colonies based on the number and contour of the bacterial colonies, so as to solve the problems that the operation of classifying and counting different strains according to the bacterial colony image at present depends on manual operation, the operation process greatly consumes manpower and is subject